4,629 results match your criteria Chemsuschem[Journal]


Induced CO2 Electroreduction to Formic Acid on Metal-Organic Frameworks via Node Doping.

ChemSusChem 2020 Jul 11. Epub 2020 Jul 11.

Shanghai Advanced Research Institute, CAS Key Laboratory of Low-Carbon Vonversion Science and Engineering, 100 Haike Road, 201210, Shanghai, CHINA.

Metal-organic frameworks (MOFs), combining the advantages of heterogeneous and homogeneous components, have been explored as a novel kind of catalytic materials for CO 2 electroreduction reaction (CO 2 ERR). However, the unmatched metal nodes subject MOFs to the lower faradaic efficiency (FE) and limited current density in CO 2 ERR. Herein, we report a general strategy to promote activities of MOFs via node doping in CO 2 ERR. Read More

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http://dx.doi.org/10.1002/cssc.202001310DOI Listing

Lignin Source and Structural Characterization.

Authors:
Run-Cang Sun

ChemSusChem 2020 Jul 8. Epub 2020 Jul 8.

Center for Lignocellulose Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, P. R. China.

Lignin is a primary component of lignocellulosic biomass and an underutilized feedstock in the growing pulping and biofuel industries. Currently, over 50 million tons of industrial lignin are produced annually from pulping and bioethanol processes in the world. Around 95 % of industrial lignin is burned as fuel in heat and power plants due to its complicated, destructive, and condensed structures hindering direct industrial utilization, while the remaining 5 % of lignin is used for potential applications, such as additives, binders, dispersants, and surfactants, through modification. Read More

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http://dx.doi.org/10.1002/cssc.202001324DOI Listing

Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance.

ChemSusChem 2020 Jul 6. Epub 2020 Jul 6.

State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, P.R. China.

Invited for this month's cover is the research group of Rongzhi Chen at the University of Chinese Academy of Sciences and Xinming Wang at Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. The image proposes an effective strategy to tune bonded oxygen species of carbon nitride for improving photocatalytic hydrogen production. The Full Paper itself is available at 10. Read More

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http://dx.doi.org/10.1002/cssc.202001508DOI Listing

Dealloyed Nanoporous Materials for Rechargeable Post-Lithium Batteries.

ChemSusChem 2020 Jul 29;13(13):3287. Epub 2020 Jun 29.

Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, P. R. China.

Invited for this month's cover is the group of Yi Ding at the Tianjin University of Technology. The image highlights the fast electron/ion transport in a bicontinuous open network of dealloyed nanoporous materials and describes their applications in several emerging post-lithium batteries, including Na, K, Mg, Zn, and Al batteries. The Minireview itself is available at 10. Read More

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http://dx.doi.org/10.1002/cssc.202001369DOI Listing

Across the Board: Yang Li on Visible-Light Photoredox Catalysis.

Authors:
Yang Li

ChemSusChem 2020 Jun 29. Epub 2020 Jun 29.

Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710054, Shaanxi, P.R. China.

In this series of articles, the board members of ChemSusChem discuss recent research articles that they consider of exceptional quality and importance for sustainability. This entry features Prof. Y. Read More

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http://dx.doi.org/10.1002/cssc.202001499DOI Listing

Amine-Mediated Bond Cleavage in Oxidized Lignin Models.

ChemSusChem 2020 Jun 15. Epub 2020 Jun 15.

State Key Laboratory of Catalysis (SKLC), Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics (DICP), Dalian, 116023, P.R. China.

Introducing amines/ammonia into lignin cracking will allow novel bond cleavage pathways. Herein, a method of amines/ammonia-mediated bond cleavage in oxidized lignin β-O-4 models was studied using a copper catalyst at room temperature, demonstrating the effect of the amine source on the selectivity of products. For primary and secondary aliphatic amines, lignin ketone models underwent oxidative C -C bond cleavage and C -N bond formation to generate aromatic amides. Read More

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http://dx.doi.org/10.1002/cssc.202001228DOI Listing

Similarities in Recalcitrant Structures of Industrial Non-Kraft and Kraft Lignin.

ChemSusChem 2020 Jun 15. Epub 2020 Jun 15.

Renewable Bioproducts Institute, Georgia Institute of Technology, 500 10th St NW, Atlanta, GA, 30332, USA.

This work compares the structure of industrially isolated lignin samples from kraft pulping and three alternative processes: butanol organosolv, supercritical water hydrolysis, and sulfur dioxide/ethanol/water fractionation. Kraft processes are known to produce highly condensed lignin, with reduced potential for catalytic depolymerization, whereas the alternative processes have been hypothesized to impact the lignin less. The structural properties most relevant to catalytic depolymerization are characterized by elemental analysis, quantitative C and 2 D HQSC NMR spectroscopy, gel permeation chromatography, and thermogravimetric analysis. Read More

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http://dx.doi.org/10.1002/cssc.202001219DOI Listing

Boosting Transport Kinetics of Cobalt Sulfides Yolk-Shell Spheres by Anion Doping for Advanced Lithium and Sodium Storage.

ChemSusChem 2020 Jun 15. Epub 2020 Jun 15.

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, P.R. China.

Cobalt sulfides have been popularly used in energy storage because of their high theoretical capacity and abundant redox reactions. However, poor reaction kinetics, rapid capacity decay, and severe polarization owing to volume changes during electrochemical reaction are still huge challenges for cobalt sulfides in practical applications. Herein, cobalt sulfide yolk-shell spheres were synthesized by phosphorus doping (P-CoS) to stabilize the structure of cobalt sulfides and improve their electronic/ion conductivity. Read More

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http://dx.doi.org/10.1002/cssc.202001261DOI Listing
June 2020
7.657 Impact Factor

Selective Electrocatalytic Oxidation of Biomass-Derived 5-Hydroxymethylfurfural to 2,5-Diformylfuran: from Mechanistic Investigations to Catalyst Recovery.

ChemSusChem 2020 Jun 15;13(12):3060. Epub 2020 Jun 15.

Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.

Invited for this month's cover is the group of Gyorgy Szekely at King Abdullah University of Science and Technology (KAUST). The image shows the efficient TEMPO-based electrocatalytic transformation of biomass-based C -platform chemical HMF to DFF using non-precious-metal-based electrodes in green solvents with nanofiltration-enabled catalyst recovery. The Full Paper itself is available at 10. Read More

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http://dx.doi.org/10.1002/cssc.202001276DOI Listing

Lignin Depolymerization under Continuous-Flow Conditions: Highlights of Recent Developments.

ChemSusChem 2020 Jun 12. Epub 2020 Jun 12.

Department of Chemical Engineering, Lund University, Naturvetarvägen 14, 221 00, Lund, Sweden.

Lignin is a polyaromatic polymer contained in plant cell walls, and it is considered the most abundant noncarbohydrate polymer on Earth. The aromaticity and richness of its functional groups render lignin an attractive starting biomacromolecule for conversion into a variety of value-added products. The development of successful strategies for lignin valorization infers the design of effective depolymerization protocols. Read More

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http://dx.doi.org/10.1002/cssc.202001225DOI Listing

Toward a Consolidated Lignin Biorefinery: Preserving the Lignin Structure through Additive-Free Protection Strategies.

ChemSusChem 2020 Jun 12. Epub 2020 Jun 12.

Wallenberg Wood Science Center, Department of Fiber and Polymer, Technology, School of Chemistry, Royal Institute of Technology, KTH, Teknikringen 56-58, 100 44, Stockholm, Sweden.

As part of the continuing efforts in lignin-first biorefinery concepts, this study concerns a consolidated green processing approach to obtain high yields of hemicelluloses and lignin with a close to native molecular structure, leaving a fiber fraction enriched in crystalline cellulose. This is done by subcritical water extraction of hemicelluloses followed by organosolv lignin extraction. This initial report focuses on a detailed characterization of the lignin component, with the aim of unravelling processing strategies for the preservation of the native linkages while still obtaining good yields and high purity. Read More

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http://dx.doi.org/10.1002/cssc.202000974DOI Listing

Lignin depolymerization: a comparison of methods to analyze monomers and oligomers.

ChemSusChem 2020 Jun 9. Epub 2020 Jun 9.

CNRS, LRGP, FRANCE.

Catalytic liquefaction of lignin is an attractive process for the production of fuels and chemicals, but it forms a wide range of liquid products from monomers to oligomers. Oligomers represent an important fraction of the products and their analysis is complex. Therefore, rapid characterization methods are needed in order to screen liquefaction conditions based on the distribution in monomers and oligomers. Read More

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http://dx.doi.org/10.1002/cssc.202001126DOI Listing

An Introduction to Model Compounds of Lignin Linking Motifs; Synthesis and Selection Considerations for Reactivity Studies.

ChemSusChem 2020 Jun 8. Epub 2020 Jun 8.

Department of Chemical Engineering (ENTEG), University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands.

The development of fundamentally new valorization strategies for lignin plays a vital role in unlocking the true potential of lignocellulosic biomass as sustainable and economically compatible renewable carbon feedstock. In particular, new catalytic modification and depolymerization strategies are required. Progress in this field, past and future, relies for a large part on the application of synthetic model compounds that reduce the complexity of working with the lignin biopolymer. Read More

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http://dx.doi.org/10.1002/cssc.202000989DOI Listing

Unravelling the Mechanism of Rechargeable Aqueous Zn-MnO Batteries: Implementation of Charging Process by Electrodeposition of MnO.

ChemSusChem 2020 Jun 4. Epub 2020 Jun 4.

Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK.

Poor cycling stability and mechanistic controversies have hindered the wider application of rechargeable aqueous Zn-MnO batteries. Herein, direct evidence was provided of the importance of Mn in this type of battery by using a bespoke cell. Without pre-addition of Mn , the cell exhibited an abnormal discharge-charge profile, meaning it functioned as a primary battery. Read More

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http://dx.doi.org/10.1002/cssc.202001216DOI Listing

Recent Advances on Imidazolium-Functionalized Organic Cationic Polymers for CO Adsorption and Simultaneous Conversion into Cyclic Carbonates.

ChemSusChem 2020 Jun 1. Epub 2020 Jun 1.

School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P.R. China.

The cycloaddition reaction of CO with various epoxides to generate cyclic carbonates is one of the most promising and efficient approaches for CO fixation. Typical imidazolium-based ionic liquids possessing electrophilic cations and nucleophilic halogen anions have been identified as excellent and environmentally friendly candidates for synergistically activating epoxides to convert CO . Therefore, the feasible construction of a series of imidazolium-functionalized organic cationic polymers can bridge the gap between homogeneous and heterogeneous catalysis, thereby obtaining highly selective CO adsorption and simultaneous conversion ability. Read More

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http://dx.doi.org/10.1002/cssc.202001079DOI Listing

Plasmonic Photocatalysts for Sunlight-Driven Reduction of CO : Details, Developments, and Perspectives.

ChemSusChem 2020 May 31. Epub 2020 May 31.

Department of Chemical Engineering, Laval University, 1065 Avenue de la Médecine, Québec, Québec, G1V 0A6, Canada.

Plasmonic photocatalysis is among the most efficient processes for the photoreduction of CO into valuable fuels. The formation of localized surface plasmon resonance (LSPR), energy transfer, and surface reaction are the significant steps in this process. LSPR plays an essential role in the performance of plasmonic photocatalysts as it promotes an excellent, light absorption over a broad wavelength range while simultaneously facilitating an efficient energy transfer to semiconductors. Read More

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http://dx.doi.org/10.1002/cssc.202000905DOI Listing

Recycling of Flexible Polyurethane Foam by Split-Phase Alcoholysis: Identification of Additives and Alcoholyzing Agents to Reach Higher Efficiencies.

ChemSusChem 2020 May 29. Epub 2020 May 29.

Microbial and Molecular Systems, Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS), KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.

Split-phase alcoholysis of flexible polyurethane (PU) foam yields an apolar phase containing the recycled polyether polyol, and a lower, polar phase of the alcoholyzing agent and aromatic compounds. However, multiple purification steps are required to render the polyether polyol suitable for synthesis of new flexible PU foams; the unfavorable mass balance limits industrial applications. In this work, 2-pyrrolidone was identified as a performant additive for accelerating the dissolution and depolymerization process. Read More

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http://dx.doi.org/10.1002/cssc.202000949DOI Listing

Oxygen-Defect-Rich Cobalt Ferrite Nanoparticles for Practical Water Electrolysis with High Activity and Durability.

ChemSusChem 2020 May 29. Epub 2020 May 29.

Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741246, India.

The scope of any metal oxide as a catalyst for driving electrocatalytic reactions depends on its electronic structure, which is correlated to its oxygen-defect density. Likewise, to transform a spinel oxide, such as cobalt ferrite (CoFe O ), into a worthy universal-pH, bifunctional electrocatalyst for the hydrogen and oxygen evolution reactions (HER and OER, respectively), oxygen defects need to be regulated. Prepared by coprecipitation and inert calcination at 650 °C, CoFe O nanoparticles (NPs) require 253 and 300 mV OER overpotentials to reach current densities of 10 and 100 mA cm , respectively, if nickel foam is used as a substrate. Read More

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http://dx.doi.org/10.1002/cssc.202000932DOI Listing
May 2020
7.657 Impact Factor

Nontargeted Analysis Strategy for the Identification of Phenolic Compounds in Complex Technical Lignin Samples.

ChemSusChem 2020 May 29. Epub 2020 May 29.

Lund University, Department of Chemistry, Centre for Analysis and Synthesis, P.O. Box 124, 22100, Lund, Sweden.

Lignin is the second most abundant biopolymer in nature and a promising renewable resource for aromatic chemicals. For the understanding of different lignin isolation and conversion processes, the identification of phenolic compounds is of importance. However, given the vast number of possible chemical transformations, the prediction of produced phenolic structures is challenging and a nontargeted analysis method is therefore needed. Read More

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http://dx.doi.org/10.1002/cssc.202000951DOI Listing

Comparison of Two Acid Hydrotropes for Sustainable Fractionation of Birch Wood.

ChemSusChem 2020 May 28. Epub 2020 May 28.

USDA Forest Service, Forest Products Laboratory, Madison, WI, USA.

This study reports on a comparative study of acid hydrotropic fractionation (AHF) of birch wood using maleic acid (MA) and p-toluenesulfonic acid (p-TsOH). Under the same level of delignification, lignin dissolved by MA is much less condensed with a higher content of ether aryl β-O-4 linkages. Lignin depolymerization dominated in MA hydrotropic fractionation (MAHF) and resulted in a single lower molecular weight peak, in contrast to the competitive depolymerization and repolymerization in p-TsOH AHF with a bimodal distribution. Read More

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http://dx.doi.org/10.1002/cssc.202001120DOI Listing

Coupled Copper-Zinc Catalysts for Electrochemical Reduction of Carbon Dioxide.

ChemSusChem 2020 May 28. Epub 2020 May 28.

Center for Sustainable Future Technologies @POLITO, Istituto Italiano di Tecnologia, Via Livorno 60, 10144, Turin, Italy.

A catalyst plays a key role in the electrochemical reduction of CO to valuable chemicals and fuels. Hence, the development of efficient and inexpensive catalysts has attracted great interest from both the academic and industrial communities. In this work, low-cost catalysts coupling Cu and Zn are designed and prepared with a green microwave-assisted route. Read More

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http://dx.doi.org/10.1002/cssc.202000971DOI Listing

Lignin-Based Micro- and Nanomaterials and their Composites in Biomedical Applications.

ChemSusChem 2020 May 28. Epub 2020 May 28.

Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, No. 9 at 13th Avenue, TEDA, Tianjin, 300457, China.

Lignin, as the most abundant aromatic renewable biopolymer in nature, has long been regarded as waste and simply discarded from the pulp and paper industry. In recent years, with many breakthroughs in lignin chemistry, pretreatment, and processing techniques, a lot of the inherent bioactivities of lignin, including antioxidant activities, antimicrobial activities, biocompatibilities, optical properties, and metal-ion chelating and redox activities, have been discovered and this has opened a new field not only for lignin-based materials but also for biomaterials. In this Review, the biological activities of lignin and drug/gene delivery and bioimaging applications of various types of lignin-based material are summarized. Read More

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http://dx.doi.org/10.1002/cssc.202000783DOI Listing
May 2020
7.657 Impact Factor

Modeling of Ion Agglomeration in Magnesium Electrolytes and its Impacts on Battery Performance.

ChemSusChem 2020 May 28. Epub 2020 May 28.

Institute of Engineering Thermodynamics, Computational Electrochemistry, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569, Stuttgart, Germany.

The choice of electrolyte has a crucial influence on the performance of rechargeable magnesium batteries. In multivalent electrolytes an agglomeration of ions to pairs or bigger clusters may affect the transport in the electrolyte and the reaction at the electrodes. In this work the formation of clusters is included in a general model for magnesium batteries. Read More

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http://dx.doi.org/10.1002/cssc.202001034DOI Listing

Synthesizing High-Capacity Oxyfluoride Conversion Anodes by Direct Fluorination of Molybdenum Dioxide (MoO ).

ChemSusChem 2020 May 27. Epub 2020 May 27.

Chemistry Department, University of Tennessee, Knoxville, TN, 37996, USA.

High-capacity metal oxide conversion anodes for lithium-ion batteries (LIBs) are primarily limited by their poor reversibility and cycling stability. In this study, a promising approach has been developed to improve the electrochemical performance of a MoO anode by direct fluorination of the prelithiated MoO . The fluorinated anode contains a mixture of crystalline MoO and amorphous molybdenum oxyfluoride phases, as determined from a suite of characterization methods including X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy, and scanning transmission electron microscopy. Read More

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http://dx.doi.org/10.1002/cssc.202001006DOI Listing

Greener Routes to Biomass Waste Valorization: Lignin Transformation Through Electrocatalysis for Renewable Chemicals and Fuels Production.

ChemSusChem 2020 May 27. Epub 2020 May 27.

School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA.

Lignin valorization is essential for biorefineries to produce fuels and chemicals for a sustainable future. Today's biorefineries pursue profitable value propositions for cellulose and hemicellulose; however, lignin is typically used mainly for its thermal energy value. To enhance the profit potential for biorefineries, lignin valorization would be a necessary practice. Read More

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http://dx.doi.org/10.1002/cssc.202000987DOI Listing

Platinum-Decorated Ceria Enhances CO Electroreduction in Solid Oxide Electrolysis Cells.

ChemSusChem 2020 May 27. Epub 2020 May 27.

State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, P.R. China.

CO electroreduction by solid oxide electrolysis cells (SOECs) can not only attenuate the greenhouse effect, but also convert surplus electrical energy into chemical energy. The adsorption and activation of CO on the cathode play an important role in the SOEC performance. La Sr Co Fe O -Ce Sm O (LSCF-SDC; SDC=samarium-doped ceria) is a promising SOEC cathode. Read More

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http://dx.doi.org/10.1002/cssc.202001002DOI Listing
May 2020
7.657 Impact Factor

Transition-Metal Phosphorus Trisulfides and its Vacancy Defects: Emergence of a New Class of Anode Material for Li-Ion Batteries.

ChemSusChem 2020 May 27. Epub 2020 May 27.

School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India), E-mail.

In the search of suitable anode candidates with high specific capacity, favorable potential, and structural stability for lithium-ion batteries (LIBs), transition-metal phosphorus trisulfides (TMPS ) can be considered as one of the most promising alternatives to commercial graphite. Here, it was demonstrated that the limitations of commercial anode materials (i.e. Read More

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http://dx.doi.org/10.1002/cssc.202001302DOI Listing

Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance.

ChemSusChem 2020 May 26. Epub 2020 May 26.

State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.

Polymeric carbon nitrides (CNs) have been identified as attractive photocatalysts owing to their comparatively low cost and facile modification of their electronic structure. Herein, we report an effective strategy to tune the surface oxygen species linking site of polymeric CN, achieving more effective charge separation. A high photocatalytic hydrogen production rate of approximately 10225 μmol h ⋅g under visible light irradiation (λ>420 nm) and an impressive apparent quantum efficiency (AQE) of 5. Read More

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http://dx.doi.org/10.1002/cssc.202001027DOI Listing

Self-Aggregation-Controlled Rapid Chemical Bath Deposition of SnO Layers and Stable Dark Depolarization Process for Highly Efficient Planar Perovskite Solar Cells.

ChemSusChem 2020 May 25. Epub 2020 May 25.

Graduate School of Energy and Environment (KU-KIST Green School), Korea University, 145 Anam-ro, Seungbuk-gu, Seoul, Korea.

Planar perovskite solar cells (PSCs) incorporating n-type SnO have attracted significant interest because of their excellent photovoltaic performance. However, the film fabrication of SnO is limited by self-aggregation and inhomogeneous growth of the intermediate phase, which produces poor morphology and properties. In this study, a self-controlled SnO layer is fabricated directly on a fluorine-doped tin oxide (FTO) surface through simple and rapid chemical bath deposition. Read More

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http://dx.doi.org/10.1002/cssc.202000501DOI Listing

Tracing Sweetgum Lignin's Molecular Properties through Biorefinery Processing.

ChemSusChem 2020 May 25. Epub 2020 May 25.

Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC, 27695, USA.

Changes to the molecular properties of lignin over the course of biorefinery processing were investigated by using sweetgum as a feedstock. Hydrothermal pretreatment has been used because it is an economically attractive, green process. Three representative biorefinery lignin preparations were obtained, with about 70 % yield based on raw lignin. Read More

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http://dx.doi.org/10.1002/cssc.202001125DOI Listing

Electrochemical Selective Recovery of Heavy Metal Vanadium Oxyanion from Continuously Flowing Aqueous Streams.

ChemSusChem 2020 May 25. Epub 2020 May 25.

Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.

An electrochemical flow cell with redox-active electrodes was used for selective removal and recovery of vanadium(V) oxyanions from aqueous streams. The cell relies on intrinsic affinity of the redox-active polymer poly(vinyl)ferrocene (PVFc) and demonstrates selectivity of >10 towards vanadium compared to a background electrolyte in 40-fold abundance. We demonstrate highly selective vanadium removal in the presence of various competing anions (i. Read More

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http://dx.doi.org/10.1002/cssc.202001094DOI Listing

Oxidative Esterification of 5-Hydroxymethylfurfural with an N-doped Carbon-supported CoCu Bimetallic Catalyst.

ChemSusChem 2020 May 25. Epub 2020 May 25.

College of Energy, Xiamen University, Xiamen, 361102, P. R. China.

The direct fabrication of furan-2,5-dimethylcarboxylate (FDMC), a promising renewable monomer, from biomass-derived 5-hydroxymethylfurfural (HMF) is a cutting-edge process. In this contribution, an elaborately designed N-doped carbon-supported CoCu bimetallic catalyst (Co Cu -NC; x/y=9:1, 7:3, 4:6, which represents the designed molar ratio of Co and Cu in the catalyst), which could offer a desirable FDMC yield of 95 % under mild and base-free conditions (Co Cu -NC, 2 bar O , 80 °C, 4 h) is described for the oxidative esterification of HMF. Notably, an FDMC formation rate of 6. Read More

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http://dx.doi.org/10.1002/cssc.202000537DOI Listing
May 2020
7.657 Impact Factor

Synthesis of Dicarboxylic Acids from Aqueous Solutions of Diols with Hydrogen Evolution Catalyzed by an Iridium Complex.

ChemSusChem 2020 May 25. Epub 2020 May 25.

Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.

A catalytic system for the synthesis of dicarboxylic acids from aqueous solutions of diols accompanied by the evolution of hydrogen was developed. An iridium complex bearing a functional bipyridonate ligand with N,N-dimethylamino substituents exhibited a high catalytic performance for this type of dehydrogenative reaction. For example, adipic acid was synthesized from an aqueous solution of 1,6-hexanediol in 97 % yield accompanied by the evolution of four equivalents of hydrogen by the present catalytic system. Read More

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http://dx.doi.org/10.1002/cssc.202001052DOI Listing

Metal-Acid Synergy: Hydrodeoxygenation of Anisole over Pt/Al-SBA-15.

ChemSusChem 2020 May 24. Epub 2020 May 24.

Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, Melbourne, VIC, 3000, Australia.

Hydrodeoxygenation (HDO) is a promising technology to upgrade fast pyrolysis bio-oils but it requires active and selective catalysts. Here we explore the synergy between the metal and acid sites in the HDO of anisole, a model pyrolysis bio-oil compound, over mono- and bi-functional Pt/(Al)-SBA-15 catalysts. Ring hydrogenation of anisole to methoxycyclohexane occurs over metal sites and is structure sensitive; it is favored over small (4 nm) Pt nanoparticles, which confer a turnover frequency (TOF) of approximately 2000 h and a methoxycyclohexane selectivity of approximately 90 % at 200 °C and 20 bar H ; in contrast, the formation of benzene and the desired cyclohexane product appears to be structure insensitive. Read More

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http://dx.doi.org/10.1002/cssc.202000764DOI Listing

Reactive Extraction Enhanced by Synergic Microwave Heating: Furfural Yield Boost in Biphasic Systems.

ChemSusChem 2020 May 24. Epub 2020 May 24.

Molecular NanoFabrication group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands.

Reactive extraction is an emerging operation in the industry, particularly in biorefining. Here, reactive extraction was demonstrated, enhanced by microwave irradiation to selectively heat the reactive phase (for efficient reaction) without unduly heating the extractive phase (for efficient extraction). These conditions aimed at maximizing the asymmetries in dielectric constants and volumes of the reaction and extraction phases, which resulted in an asymmetric thermal response of the two phases. Read More

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http://dx.doi.org/10.1002/cssc.202000966DOI Listing

Product-oriented Direct Cleavage of Chemical Linkages in Lignin.

ChemSusChem 2020 May 25. Epub 2020 May 25.

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Lignin is one of the most important biomacromolecules in the plant biomass and the largest renewable source of aromatic building blocks in nature. Selectively producing value-added chemicals from the catalytic transformation of renewable lignin is of strategic significance and meet sustainability targets owing to the excessive consumption of non-renewable petroleum resource, but remains a long-term challenge owing to the complexity of lignin structure. This Minireview provides a summary and perspective of the extensive research that provides insight into selectively catalytic transformations of lignin and its derived monomers via directed scissor of chemical linkages (C-O and C-C bonds) with product-oriented targets. Read More

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http://dx.doi.org/10.1002/cssc.202001025DOI Listing

Addition of Highly Polarized Organometallic Compounds to N-tert-Butanesulfinyl Imines in Deep Eutectic Solvents under Air: Preparation of Chiral Amines of Pharmaceutical Interest.

ChemSusChem 2020 May 23. Epub 2020 May 23.

Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari "Aldo Moro", Consorzio C.I.N.M.P.I.S., Via E. Orabona 4, 70125, Bari, Italy.

Highly polarized organometallic compounds of s-block elements are added smoothly to chiral N-tert-butanesulfinyl imines in the biodegradable d-sorbitol/choline chloride eutectic mixture, thereby granting access to enantioenriched primary amines after quantitatively removing the sulfinyl group. The practicality of the method is further highlighted by proceeding at ambient temperature and under air, with very short reaction times (2 min), enabling the preparation of diastereoisomeric sulfinamides in very good yields (74-98 %) and with a broad substrate scope, and the possibility of scaling up the process. The method is demonstrated in the asymmetric syntheses of both the chiral amine side-chain of (R,R)-Formoterol (96 % ee) and the pharmaceutically relevant (R)-Cinacalcet (98 % ee). Read More

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http://dx.doi.org/10.1002/cssc.202001142DOI Listing

Hydrophobic Interaction Chromatography in 2 D Liquid Chromatography Characterization of Lignosulfonates.

ChemSusChem 2020 May 22. Epub 2020 May 22.

Institute of Chemistry of Renewable Resources, Department of Chemistry, University of Natural Resources and Life Sciences, Vienna (BOKU), Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria.

Lignosulfonates are bulk-scale byproducts of industrial sulfite pulping. Their amphiphilic character plays a central role in their successful application in large-scale materials production. As an inherent feature of the chemical structure, this amphiphilic character poses a major analytical challenge. Read More

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http://dx.doi.org/10.1002/cssc.202000849DOI Listing

A Glimpse into Green Chemistry Practices in the Pharmaceutical Industry.

ChemSusChem 2020 Jun 20;13(11):2806. Epub 2020 May 20.

Department of Chemistry, University of Louisville, 2320 S. Brook St., Louisville, KY, 40292, USA.

Invited for this month's cover is the research group of Sachin Handa at the University of Louisville and Wilfried Braje at AbbVie. The image shows how green chemistry in industry and micellar catalysis are contributing toward the environmental sustainability. The Minireview itself is available at 10. Read More

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http://dx.doi.org/10.1002/cssc.202001204DOI Listing
June 2020
7.657 Impact Factor

Fractionating and Purifying Softwood Kraft Lignin with Aqueous Renewable Solvents: Liquid-Liquid Equilibrium for the Lignin-Ethanol-Water System.

ChemSusChem 2020 May 19. Epub 2020 May 19.

Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina, 29634-0909, United States.

Hot ethanol-water solutions can be used to simultaneously fractionate and purify softwood Kraft lignin through the Aqueous Lignin Purification with Hot Agents (ALPHA) process, using the regions of liquid-liquid equilibrium (LLE) that form at selected temperatures and solvent-to-lignin feed (S/F) ratios. Lignin, ethanol, and water compositions are measured for the solvent-rich (SR) and lignin-rich (LR) liquid phases in mutual equilibrium, as well as the lignin and metals mass distributions between the two phases. As depicted in quasi-ternary diagrams for clarity, both temperature and S/F ratio can be used to grow, merge, and even split the regions of LLE, giving significant control over both molecular weight (MW) and lignin purity. Read More

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http://dx.doi.org/10.1002/cssc.202000701DOI Listing

A Metal-Free Electrode: From Biomass-Derived Carbon to Hydrogen.

ChemSusChem 2020 May 19. Epub 2020 May 19.

Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany.

Hydrogen is the emission-free fuel of the future if produced from non-fossil sources. Biomass gasification or electrolysis of water are possible clean routes. For a global application, the material solution for the electrodes must be sustainable, scalable, and relatively inexpensive compared to the current precious metal-based electrodes. Read More

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http://dx.doi.org/10.1002/cssc.202000714DOI Listing

Aqueous Calcium-Ion Battery Based on a Mesoporous Organic Anode and a Manganite Cathode with Long Cycling Performance.

ChemSusChem 2020 May 19. Epub 2020 May 19.

Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, PR China.

Aqueous batteries have attracted increasing and extensive attention, owing to their high safety, low cost, and low toxicity. These factors have become increasingly important, given the current focus on the rapid development of green energy technologies. In particular, multivalent-ion batteries are emerging as alternatives to lithium-ion batteries. Read More

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http://dx.doi.org/10.1002/cssc.202000812DOI Listing

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible-Light-Driven Photocatalysis.

ChemSusChem 2020 May 18. Epub 2020 May 18.

Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA, 92182, USA.

Artificial photosynthesis has attracted increasing attention due to recent environmental and energy concerns. Metal halide perovskites (MHPs) demonstrating excellent optoelectronic properties have currently emerged as novel and efficient photocatalytic materials. Herein, the structural features of MHPs that are responsible for the photoinduced charge separation and charge migration properties are briefly introduced, and then important and necessary photophysical and photochemical aspects of MHPs related to photoredox catalysis are summarized. Read More

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http://dx.doi.org/10.1002/cssc.202000953DOI Listing

Solid-Electrolyte Interphase During Battery Cycling: Theory of Growth Regimes.

ChemSusChem 2020 May 18. Epub 2020 May 18.

Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569, Stuttgart, Germany.

The capacity fade of modern lithium ion batteries is mainly caused by the formation and growth of the solid-electrolyte interphase (SEI). Numerous continuum models support its understanding and mitigation by studying SEI growth during battery storage. However, only a few electrochemical models discuss SEI growth during battery operation. Read More

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http://dx.doi.org/10.1002/cssc.202000867DOI Listing

Tailoring Activated Carbons for Efficient Downstream Processing: Selective Liquid-Phase Adsorption of Lysine.

ChemSusChem 2020 May 18. Epub 2020 May 18.

Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany.

The essential amino acid lysine is of great importance in the nutrition and pharmaceutical industries and is mainly produced in biorefineries by the fermentation of glucose. In biorefineries, downstream processing is often the most energy-consuming step. Adsorption on hydrophobic adsorbents represents an energy, resource, and cost-saving alternative. Read More

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http://dx.doi.org/10.1002/cssc.202000885DOI Listing

Highly Efficient Cleavage of Ether Bonds in Lignin Models by Transfer Hydrogenolysis over Dual-Functional Ruthenium/Montmorillonite.

ChemSusChem 2020 May 18. Epub 2020 May 18.

Department of Chemistry, Renmin University of China, Beijing, 100872, PR China.

Cleavage of ether bonds is a crucial but challenging step for lignin valorization. To efficiently realize this transformation, the development of robust catalysts or catalytic systems is required. In this study, montmorillonite (MMT)-supported Ru (denoted as Ru/MMT) is fabricated as a dual-functional heterogeneous catalyst to cleave various types of ether bonds through transfer hydrogenolysis without using any additional acids or bases. Read More

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http://dx.doi.org/10.1002/cssc.202000978DOI Listing

Pickering/Non-Pickering Emulsions of Nanostructured Sulfonated Lignin Derivatives.

ChemSusChem 2020 May 17. Epub 2020 May 17.

Green Processes Research Centre and Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada.

Sulfoethylated lignin (SEKL) polymeric surfactant and sulfoethylated lignin nanoparticles (N-SEKL) with a size of 750±50 nm are produced by using a facile green process involving a solvent-free reaction and acidification-based fractionation. SEKL forms a liquid-like conventional emulsion with low viscosity that has temporary stability (5 h) at pH 7. However, N-SEKL forms a gel-like, motionless, and ultra-stable Pickering emulsion through a network of interactions between N-SEKL particles, which creates steric hindrance among the oil droplets at pH 3. Read More

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http://dx.doi.org/10.1002/cssc.202000965DOI Listing

Unlocking Structure-Reactivity Relationships for Catalytic Hydrogenolysis of Lignin into Phenolic Monomers.

ChemSusChem 2020 May 18. Epub 2020 May 18.

Center for Lignocellulose Chemistry and Biomaterials, Liaoning Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, P. R. China.

Lignin depolymerization into aromatic monomers with high yields and selectivity is essential for the economic feasibility of biorefinery. However, the relationship between lignin structure and its reactivity for upgradeability is still poorly understood, in large part owing to the difficulty in quantitative characterization of lignin structural properties. To overcome these shortcomings, advanced NMR technologies [2D HSQC (heteronuclear single quantum coherence) and P] were used to accurately quantify lignin functionalities. Read More

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http://dx.doi.org/10.1002/cssc.202000785DOI Listing

An Efficient Electrochromic Supercapacitor Based on Solution-Processable Nanoporous Poly{tris[4-(3,4-ethylenedioxythiophene)phenyl]amine}.

ChemSusChem 2020 May 15. Epub 2020 May 15.

International Sci. & Tech. Cooperation Base of Energy Materials and Application, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P.R. China.

A new green synthetic route to tris[4-(3,4-ethylenedioxythiophene)phenyl]amine (TEPA) monomer has been developed and the molecular structure of TEPA has been determined by using single-crystal XRD. Solution-processable nanoporous poly{tris[4-(3,4-ethylenedioxythiophene)phenyl]amine} (PTEPA) is prepared by a chemical oxidative polymerization in a microemulsion. Based on the distorted structure of TEPA in the solid state, it is proposed that dendritic PTEPA has a distorted 3 D conformation with multiple twisted channels and pores that are narrowed and blocked by bifurcation and distortion of PTEPA, which is consistent with the observed hierarchical pore structure. Read More

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http://dx.doi.org/10.1002/cssc.202000941DOI Listing

Kinetics of Secondary Reactions Affecting the Organosolv Lignin Structure.

ChemSusChem 2020 May 15. Epub 2020 May 15.

Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO, 63130, USA.

Many valorization approaches for lignin rely on its organic solvent (organosolv) extraction. However, the severity of the extraction conditions required to obtain high lignin extraction generally results in low-quality lignin for downstream processing. To better understand the secondary reaction pathways and kinetics related to molecular alterations that result from organosolv extraction under extreme conditions, extractions were conducted at temperatures of 150, 180, and 210 °C. Read More

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http://dx.doi.org/10.1002/cssc.202000942DOI Listing